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December Weather in Lillers, France

Last updated: August 23, 2025

In December, the average temperature in Lillers, France hovers around 6°C (43°F). Expect chilly days, with the mercury dipping to a brisk -3°C (27°F) at times, while reaching a comfortable maximum of 14°C (58°F). Prepare for 95 mm (3.7 in) of precipitation spread over approximately 16 days, making it one of the wetter months. With an average humidity of 92%, don't forget to layer up and stay dry!

December Temperature in Lillers

In December in Lillers, the average temperature is 6°C (43°F). The maximum can reach 14°C (58°F), while the minimum can drop as low as -3°C (27°F). It's advisable to pack both warm clothing and lighter layers to accommodate the fluctuating temperatures during your travels.

December Weather in Lillers: Daily Temperature Highs, Lows, and Averages

The chart illustrates December temperature patterns in Lillers, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Lillers, December typically has an average temperature of 6°C (43°F), with highs reaching up to 14°C (58°F) and lows dropping to around -3°C (27°F).
JanFebMarAprMayJunJulAugSepOctNovDec404245505563656560544643
Data source: Temperature data for Lillers generated using information from the Copernicus Climate Change Service.
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The average of daily temperatures (24 hours) calculated across all days in the month.

December Precipitation in Lillers

In Lillers in December, the precipitation amount is 95 mm (3.7 in) spread over 16 days.

December Precipitation Trends in Lillers

The chart displays monthly precipitation patterns in Lillers, with values for each month alongside December’s data, which is highlighted for easy comparison. It shows the amount of precipitation, providing insights into how December’s conditions compare to those of other months. In Lillers, December typically receives around 95 mm (3.7 inches) of precipitation spread over approximately 16 days.
JanFebMarAprMayJunJulAugSepOctNovDec625964376665477050826195
Data source: Precipitation data for December generated using information from the Copernicus Climate Change Service.
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December Humidity in Lillers

In Lillers in December humidity is 92%. With an average temperature of 6°C (43°F), this humidity feels like a damp chill that seeps through your clothes, making outdoor activities uncomfortable and requiring extra layers for warmth while navigating the slick streets.

December Average Humidity in Lillers

This chart illustrates the average monthly humidity levels in Lillers, with December’s data highlighted for easy comparison. It shows the fluctuation in humidity throughout the year, helping you understand how conditions vary by season. In December, average humidity in Lillers is approximately 92%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec91%89%86%85%82%81%76%73%80%89%92%92%
Data source: Humidity data for December generated using information from the Copernicus Climate Change Service.

December UV Index in Lillers

In Lillers in December, the maximum UV index is 1, which corresponds to a low Exposure Category. This means you have a time to burn of 45 minutes. For more details, you can check the Hourly UV Index in Lillers.

Maximum UV Index Levels in Lillers for December

The chart shows the monthly maximum UV Index (UVI) for Lillers in December, representing the highest UV radiation level. The UVI measures the intensity of ultraviolet radiation from the sun, indicating the potential risk of sunburn and UV-related health issues. In December, the maximum UV index in Lillers typically reaches 1, which falls under the low exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec224679875421
Data source: Lillers December UVI data generated using information from the Copernicus Climate Change Service.

UV Risk Categories

  •  Extreme (11+): Avoid the sun, stay in shade.
  •  Very High (8-10): Limit sun exposure.
  •  High (6-7): Use SPF 30+ and protective clothing.
  •  Moderate (3-5): Midday shade recommended.
  •  Low (0-2): No protection needed.

How December Weather in Lillers Compares to Other Months

Weather in Lillers varies notably across the year, with each month offering distinct climate conditions. This page compares December’s weather to other months in Lillers, focusing on differences in temperature, rainfall, humidity, and UV levels.

This table compares monthly weather conditions in Lillers, showing how December’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather4°C (40°F)62 mm (2.4 inches)91%low
February Weather6°C (42°F)59 mm (2.3 inches)89%low
March Weather7°C (46°F)64 mm (2.5 inches)86%moderate
April Weather10°C (50°F)37 mm (1.5 inches)85%high
May Weather13°C (56°F)66 mm (2.6 inches)82%high
June Weather17°C (63°F)65 mm (2.6 inches)81%very high
July Weather18°C (65°F)47 mm (1.8 inches)76%very high
August Weather18°C (65°F)70 mm (2.8 inches)73%high
September Weather15°C (60°F)50 mm (2.0 inches)80%moderate
October Weather12°C (55°F)82 mm (3.2 inches)89%moderate
November Weather8°C (46°F)61 mm (2.4 inches)92%low
December Weather6°C (43°F)95 mm (3.7 inches)92%low

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